Hi there D Vijayananda Vivek,

I am now just recently getting into that subject so I can't really say if it is right or not. If you have a doubt or you know that it is wrong, you can always report that specific problem. You can find the "Report Problem" button to the right of the "Watch Video or Use Hint" button. You have four choices of problems for that specific quetion(The answer is wrong, You caught a typo, The question or hint is confusing, or it isn't working). In your case, you should press the "The Answer is Wrong" button. 

Hope this answers your question,

TheUnderratedProgrammer